Hand chemical fire-extinguisher



UNITED STATES PATENT EEICE,

ARTHUR E. HARRIsoM-oE-EALTIMORE, MARYLAND, AssIGNoR on THREE- EoURTHs To DUNcAN'vEAsEY, 0E sAME PLACE, AND WILLIAM M. HAR- RIsoN, on LAUREL, MARYLAND.

HAND CHEMICAL Fl RE EXTINGUISHE,R.

SPECIFICATION forming part of Lettempnt No. amaca-dated october 27, 1885.

To LLZZ whom; t may concern:

Be it known that I, ARTHUR B. HARRISON, of the city of Baltimore and State of Maryland, have invented certain new7 and useful Improvementsin Chemical Fire-Extinguishers, of which the following is a specification, reference being had to the accompanying drawings, formi-ng part hereof, in which- Figure l is a view, partly in section and j' `Io lpartly in side elevation, showing my invention. Fig. 2 is a detail side elevation of my 'improved plug, and Fig. 3 is a View of a modified form of piston rod or handle.

Like letters mark the same parts in all the figures.

My invention relates to devices for storing and applying chemicals for extinguishing fires; and it consists in a syringe for that purpose, the construction, arrangement, and com- 20' bination ofthe parts of which I shall now proceed to fully describe, the specific points of novelty being set forth in the claims appended to this specification.

Referring to the drawings by letter, A is the body of a syringe, or cylinder thereof,

which is of ordinary construction, being provided with a removable cover or lid, a, at one end and a contracted cone-shaped point, a', at the other, said point terminating in an 3o opening of the desired size to serve as, an exit 4o erated. The piston D is composedof a leather or other dexible washer, d, between two sheetmetal washers, d and d?, each of which is dish-shaped, the washer d being of a greater diameter than the washer d2, and having its dish or concavity in the opposite direction thereto. These washers are pressed together upon the flexible Washer by means of ascrew, di, which passes through all three ofthe stream at any time.

Application led May 11, 1885. Serial No. 165,156. (No model.)

washers or disks and engages with its thread a nut, dt. It is, however, not of sufficient length to pass through said nut, but when screwed home reaches only about the middle of it, as seen in Fig. 1. A disk, d5, of pasteboard or card-board, lies next to the sheetmetal washer d', between it and the nut d, 55 and a small disk or washer, d6, of rubber is glued on the inner side of the lid a and forms a packing for the piston-rod. The tip or plug being soldered in and the cylinder being lled with fluid, the piston is inserted, and the space between the card-board being filled with wax the apparatus is hermetically sealed and none of the huid can escape.

When it is desired to use the device, the handle is inserted through the lid and screwed into the nut d and the plug knocked out, when by pressing in the piston-rod the fluid will be ejected with great force.

The construction shown in Fig. 3 differs only in the construction of the handle, which extends through the piston and has `a nut on its inner end, being non-detachable.

My device possesses many advantages over any of the hand devices in use for extinguishing fires. The fluid can be forced to places 75 inaccessible to that from a broken hand-grenade, and can be thrown upon goods-such as dry-goods-which would not break a grenade. It is thoroughly-airtight and will preserve the Huid and prevent waste thereof. When a small quantity only is necessary, it can be applied, the operator being able to stop the It is cheap, durable, and simple, and when not in use occupies a space but slightly larger than the cylinder, the han- 8 5 dle being removable, as before described. It is so constructed that no liquid can be drawn into the cylinder by a backward movement of the piston, the leather (or iiexible) washer being bent forward in dish form by the press- 9c ure of the tin or sheet-metal washers or disks, and being thus rendered operative in a forward. movement only. A backward movement will cause all fluid in the rear of the the next forward movement.

Having thus fully described my invention, WhatI claim, and desire to secure by Letters Patent 0f the United States, is-

1. A chemical lire-extinguisher consisting 5 ofa cylinder having a sealed exit, an interior' piston, a sealed rear end, and a removable piston rod 0r handle, as set forth.

2. In combination, the pist0n-rod, the eXible disk, the two oppostely-eoncaved metal disks of different diameters, the screw and 1o nut, the card-board disk, and the Wax seal, as set forth.

ARTHUR B. HARRISON. Witnesses:

WM. BEAM,

FRANK T. HARRISON.

Correction in Letters Patent No. 329,309.

It is hereby certified that the name of one of the nssig'nees in Letters Patent No. 329,309, granted October 27, 1885, upon the application of Arthur B. Harrison, or' n Baltimore, Maryland, for an improvement in Hand Chemical Fire-Extinguishers, was

erroneously written and printed Dunean Veoeey instead of Duncan Veazey; and than L the said Letters Patent should be read with this correction therein that the same may conform to the record ofthe ease in the Patent Oiee.

Signed, eountersigned, and sealed this 3d day of November, A. D. 1885.

[SEAL] H. L. MULDROW,

A Acting Secretary of the Interim- Uountersigned i M. V. MONTGOMERY, n

Commissioner of Patents. 

